patch 8.2.4928: various white space and cosmetic mistakes

Problem:    Various white space and cosmetic mistakes.
Solution:   Change spaces to tabs, improve comments.
diff --git a/src/cindent.c b/src/cindent.c
index dc9c203..ec88036 100644
--- a/src/cindent.c
+++ b/src/cindent.c
@@ -2181,8 +2181,8 @@
 			  check_linecomment(ml_get(curwin->w_cursor.lnum - 1));
 	    if (linecomment_pos.col != MAXCOL)
 	    {
-	        trypos = &linecomment_pos;
-	        trypos->lnum = curwin->w_cursor.lnum - 1;
+		trypos = &linecomment_pos;
+		trypos->lnum = curwin->w_cursor.lnum - 1;
 	    }
 	}
 	if (trypos  != NULL)